From b0e0946840155b506dfe175999bef735f45f0908 Mon Sep 17 00:00:00 2001
From: Brian Cully <bjc@kublai.com>
Date: Mon, 12 Aug 2019 12:56:19 -0400
Subject: Add UARTE1 instance.

This will be to read from the trinket.
---
 ble/src/main.rs | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/ble/src/main.rs b/ble/src/main.rs
index 0fed859..4430e98 100644
--- a/ble/src/main.rs
+++ b/ble/src/main.rs
@@ -8,6 +8,7 @@ mod macros;
 mod rtc;
 
 use clint::HandlerArray;
+use core::fmt::Write;
 use core::mem;
 use cortex_m::asm::wfi;
 use cortex_m_rt::{entry, exception, ExceptionFrame};
@@ -18,7 +19,9 @@ extern crate panic_semihosting;
 
 use nrf52840_mdk_bsp::{
     hal::{
+        gpio::{Floating, Input, Level, Output, Pin, PushPull},
         target::{interrupt, Interrupt, UARTE0},
+        uarte::{self, Baudrate as UartBaudrate, Parity as UartParity, Uarte},
         Clocks, Rtc,
     },
     Board,
@@ -47,6 +50,14 @@ fn main() -> ! {
     let mut nvic = nrf52.NVIC;
     let mut rtc_handler = rtc::setup(Rtc::new(nrf52.RTC0), Clocks::new(nrf52.CLOCK));
 
+    let txp = nrf52
+        .pins
+        .P0_26
+        .into_push_pull_output(Level::High)
+        .degrade();
+    let rxp = nrf52.pins.P0_25.into_floating_input().degrade();
+    let mut uarte1 = uarte1(nrf52.UARTE1, txp, rxp);
+
     HANDLERS.with_overrides(|hs| {
         hs.register(0, &mut rtc_handler);
         nvic.enable(Interrupt::RTC0);
@@ -61,6 +72,7 @@ fn main() -> ! {
                 last_tick = tick;
                 last_tick -= last_tick % 1024;
                 trace!(".");
+                write!(uarte1, "!").expect("uarte1 write");
             }
             wfi();
         }
@@ -68,6 +80,23 @@ fn main() -> ! {
     unreachable!();
 }
 
+fn uarte1<U>(uarte: U, tx: Pin<Output<PushPull>>, rx: Pin<Input<Floating>>) -> Uarte<U>
+where
+    U: uarte::Instance,
+{
+    Uarte::new(
+        uarte,
+        uarte::Pins {
+            txd: tx.into_push_pull_output(Level::High),
+            rxd: rx.into_floating_input(),
+            cts: None,
+            rts: None,
+        },
+        UartParity::EXCLUDED,
+        UartBaudrate::BAUD115200,
+    )
+}
+
 #[exception]
 fn HardFault(ef: &ExceptionFrame) -> ! {
     log::logger().flush();
-- 
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